 Cone, Cylinder Edges?  Math Forum, Ask Dr. Math Common Question
A selection of answers to questions about whether cones or cylinders have edges, such as "Does a cone have an edge? A vertex?"
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 Cone Formulas (Ask Dr. Math FAQ)  Math Forum
Formulas for finding the height, surface area, and volume of a cone, right circular cone, or frustum of a cone.
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 Converting Fractions to, from Decimals  Math Forum, Ask Dr. Math Common Question
A selection of answers to questions about converting fractions to decimals and back, including how to convert repeating decimals to fractions.
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 A Crash Course in Symbolic Logic  D.J. Brasier; Math Forum, Ask Dr. Math FAQ
Is symbolic logic so hard that some people will just never be able to get it? In a gentle introduction to the notation and rules of derivation used in symbolic logic, Dr. Achilles shows why the answer to that question is 'No'.
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 Cubic and Quartic Equations  Math Forum, Ask Dr. Math FAQ
General solutions to cubic and quartic polynomial equations.
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 Cylinder Formulas (Ask Dr. Math FAQ)  Math Forum
Formulas for finding the surface area and volume of a general cylinder and a right circular cylinder.
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 Czech Statistical Office (Cesky statisticky úrad)  Czech Republic
Collects and distributes statistical data for the Czech Republic. Includes various statistics and maps on regional variation, release dates and ordering information for various publications, introduction to the department, and a FAQ about the value of
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 Defining Geometric Formulas (Ask Dr. Math FAQ)  Math Forum
Definitions of two and threedimensional figures in general, and a note on dimensions.
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 De Moivre's Theorem  Math Forum, Ask Dr. Math Common Question
A selection of answers to questions about de Moivre's theorem, including its usefulness and proofs.
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 Derivative  Math Forum, Ask Dr. Math Common Question
A selection of answers to questions about derivatives, from definitions and explanations to alternate forms of the derivative formula.
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 Diophantine Equations  Math Forum, Ask Dr. Math Common Question
A selection of answers to questions about Diophantine equations, from "find all positive integer solutions to 43x + 7y + 17z = 400" to a general method for solving them.
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 Direct and Indirect Variation  Math Forum, Ask Dr. Math Common Question
A selection of answers to questions about direct and indirect variation, with explanations of the difference between them and how to graph variation.
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 Disabilities and Math Anxiety  Math Forum, Teacher2Teacher FAQ
Answers to a frequently asked question: How can I help my child who has a physical or learning disability?
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 Distance, Rate, and Time  Math Forum, Ask Dr. Math FAQ
Distance = Rate x Time: A discussion and two problems.
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 Dividing by 0  Math Forum, Ask Dr. Math FAQ
Why can't you divide by 0? Why is 0/0 "indeterminate" and 1/0 "undefined"? Why is dividing by zero "illegal"?
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 Dividing Decimals  Math Forum, Ask Dr. Math Common Question
A selection of answers to questions about dividing decimals, including how to divide decimals with a remainder.
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 Dividing Fractions  Math Forum, Ask Dr. Math Common Question
A selection of answers to questions about dividing fractions, including an explanation of the "invertandmultiply" rule.
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 Dividing Fractions  Math Forum, Ask Dr. Math FAQ
How do you divide fractions? Say, 2/3 divided by 3/4.
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 Divisibility Rules  Math Forum, Ask Dr. Math FAQ
How can you tell whether a number is divisible by another number (leaving no remainder) without actually doing the division? Why do 'divisibility rules' work?
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 Divisibility Rules to 50 and Beyond  Stephen D.T. Froggatt; Math Forum, Ask Dr. Math FAQ
A quick way of testing primality of larger numbers: the idea of deleting the last digit and adding or subtracting a multiple of the digit from the remaining number can be generalized to test for divisibility by prime numbers up to 50 and beyond.
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 Domain and Range of a Function  Math Forum, Ask Dr. Math Common Question
A selection of answers to questions about the domain and range of a function, as well as determining the domain and range of a function from its graph.
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 Ellipse and Parabola Formulas (Ask Dr. Math FAQ)  Math Forum
Formulas for finding the area, eccentricity, perimeter of an ellipse; length of a parabolic segment.
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 Ellipsoid, Torus, Spherical Polygon Formulas (Ask Dr. Math FAQ)  Math Forum
Formulas for finding the surface area and/or volume of an ellipsoid, a prolate spheroid, an oblate spheroid, a circular or ring torus, and a spherical polygon.
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 Equivalent Measurements  Math Forum, Ask Dr. Math Common Question
A table of equivalent measurements for units such as teaspoons, tablespoons, cups, pints, quarts, gallons, ounces, and pounds.
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 Factorials 1!  30!  Math Forum, Ask Dr. Math Common Question
A table of the factorials 1! through 30!
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 Factor Table, 160  Math Forum, Ask Dr. Math Common Question
A table of the factors for the numbers 1 through 60.
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 False Proofs, Classic Fallacies  Math Forum, Ask Dr. Math FAQ
What's wrong with proofs that say 1+1 = 1, or 2 = 1?
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 Fast Food Combinations  Math Forum, Ask Dr. Math FAQ
How many possible combinations can be made from a special menu of eight items?
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 FElt (Finite ELemenT)
A free system for finite element analysis; this site provides an overview of some of its features. Contents: general overview of the FElt system components; example problems that demonstrate what kinds of problems FElt can solve, how FElt can help you
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 Fermat's Last Theorem (FLT)  Math Forum, Ask Dr. Math FAQ
What is the current status of Fermat's Last Theorem?
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 Finding a Percentage  Math Forum, Ask Dr. Math Common Question
A selection of answers to questions about finding a percentage, such as "What percentage of 76 is 27?" and "What number increased by 30% = 260?" and "What number is 25 percent of 24? 24 is what percentage of 25? 24 is 25 percent of what number?"
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 Finding Prime Factors  Math Forum, Ask Dr. Math Common Question
A selection of answers to questions about finding prime factors, along with divisibility rules for some prime numbers.
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 Finding the Center of a Circle  Math Forum, Ask Dr. Math Common Question
A selection of answers to questions about finding the center of a circle using a ruler and compass, or given its radius and two points on its circumference, or given three points on its circumference, or given its equation.
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 First Day of School  Math Forum, Teacher2Teacher FAQ
Answers to a frequently asked question: What do you do on the first day of school?
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 First Year Suggestions  Math Forum, Teacher2Teacher FAQ
Answers to a frequently asked question: Can you give me some helpful suggestions for getting through my first year of teaching?
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 Flashcards & Worksheets  Math Forum, Ask Dr. Math Common Question
A short selection of sites that provide flashcards and worksheets for practicing basic operations and more.
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 Flying Between Two Trains  Math Forum, Ask Dr. Math FAQ
Two trains 150 miles apart travel toward each other along the same track, the first train at 60 mph, the second at 90 mph. A fly buzzes back and forth between the two trains until they collide. If the fly's speed is 120mph, how far will it travel?
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 FourColor Map Theorem  Math Forum, Ask Dr. Math Common Question
A selection of answers to questions about the fourcolor map theorem, such as explanations, proofs, and extensions to higher dimensions and to the mobius strip.
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 Fractal Explorer Kit  Tom Harrington
Java applets show fractals based on the Mandelbrot Set, the Julia Set, and Newton's method. Pictures grow more detailed in a series of iterations; zoom in to see a closeup of the center. A brief FAQ explains the methods behind these different types
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 Fractal FAQ  Shirriff, Stepp
Basic frequently asked questions, suggestions for fractal resources and sites, software, archives, tutorials, from the newsgroups sci.fractals, sci.answers, news.answers. Sample questions: What is a fractal? What are some examples of fractals? What is
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 Fraction Help  Math Forum, Teacher2Teacher FAQ
Answers to a frequently asked question: How do I help students learn about fractions?
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 Fractions and Repeating Decimals  Math Forum, Ask Dr. Math Common Question
A selection of answers to questions about fractions and repeating decimals, such as how to convert a recurring decimal to a fraction, why this work, and how to tell whether a fraction will be a repeating or a terminating decimal.
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 Fractions, Decimals, Percentages  Math Forum, Ask Dr. Math FAQ
What are simple, complex, and compound fractions? How do you convert decimals and percentages to fractions?
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 Fractions & Mixed Numbers  Math Forum, Ask Dr. Math Common Question
A selection of answers to questions about improper fractions and mixed numbers, such as how to multiply and divide mixed numbers, and how to order improper fractions.
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 Frédéric Chyzak's Mgfun Project
Mgfun is a group of Maple packages intended for calculations with multivariate generating functions, in particular for their symbolic summation
and integration, and for the proof of special function and combinatorial identities. These packages include
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 The Free Fall Research Page  Green Harbor Publications
Accounts of people who "have survived a fall of thousands of feet without a working parachute." In particular, learn facts about "falling math"  how to calculate terminal velocity  and download the Free Fall Research Page Speed Conversion Table, which
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 Frequently Asked Questions in Business Statistics  Jian Chen
Why should I study business statistics? Why is an average calculated? Why is a standard deviation calculated? Why are histograms calculated? Why are we concerned with samples and sampling in data analysis? Why calculate a correlation coefficient? Why
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 Frequently Asked Questions in Management Science or Operations Research  Jian Chen
Why should I study Management Science or Operations Research? Why should a business decision maker study Decision Theory? What is Bayesian Decision Theory? Why study Linear Programming? Why study Queuing Theory? What is computer simulation? What is Inventory
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 Fuzzy Logic  Quadralay Corporation
A departure from classical twovalued sets and logic, Fuzzy Logic uses "soft" linguistic (e.g. large, hot, tall) system variables and a continuous range of truth values in the interval [0,1], rather than strict binary (True or False) decisions and assignments.
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 Geomview: 3D Visualization Software  The Geometry Center
An interactive program written by the staff of the Geometry Center for viewing and manipulating geometric objects. It can be used as a standalone viewer for static objects or as a display engine for other programs that produce dynamically changing geometry.
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